* guix/build/glib-or-gtk-build-system.scm (wrap-all-programs): Add
#:glib-or-gtk-wrap-excluded-outputs parameter and honor it.
* guix/build-system/glib-or-gtk.scm (glib-or-gtk-build): Add
#:glib-or-gtk-wrap-excluded-outputs parameter and pass it in BUILDER.
* doc/guix.texi (Build Systems): Mention it.
* guix/build/glib-or-gtk-build-system.scm (wrap-all-programs): Move body
to 'handle-output' inner procedure, and parametrize it by output name
and directory. Call it for each element of OUTPUTS.
(compile-glib-schemas): Likewise.
* guix/build/glib-or-gtk-build-system.scm (wrap-all-programs): Use
'for-each' instead of 'map' in for-effect contexts. Use 'cut' instead
of 'lambda' when appropriate.
Ludovic Courtès